package org.myrpc.utils;

import java.lang.reflect.Field;

import org.springframework.aop.framework.AdvisedSupport;
import org.springframework.aop.framework.AopProxy;
import org.springframework.aop.support.AopUtils;

public class AopTargetUtils {
	 
    /**     * 获取 目标对象     *
     *  @param proxy 代理对象     *
     *  @return 目标对象     * 
     *  @throws Exception  
     *     */    
	public static Object getTarget(Object proxy) throws Exception {     
		if (!AopUtils.isAopProxy(proxy)) return proxy;         
		if (AopUtils.isJdkDynamicProxy(proxy)) proxy = getJdkDynamicProxyTargetObject(proxy);    
		else   proxy = getCglibProxyTargetObject(proxy); 
		return getTarget(proxy);
		}
 
    private static Object getCglibProxyTargetObject(Object proxy) throws Exception {
    	Field h = proxy.getClass().getDeclaredField("CGLIB$CALLBACK_0");      
    	h.setAccessible(true);    
    	Object dynamicAdvisedInterceptor = h.get(proxy);      
    	Field advised = dynamicAdvisedInterceptor.getClass().getDeclaredField("advised");     
    	advised.setAccessible(true);  
    	Object target = ((AdvisedSupport) advised.get(dynamicAdvisedInterceptor)).getTargetSource().getTarget();     
    	return target;   
    	}
 
    private static Object getJdkDynamicProxyTargetObject(Object proxy) throws Exception {
    	Field h = proxy.getClass().getSuperclass().getDeclaredField("h");   
    	h.setAccessible(true);      
    	AopProxy aopProxy = (AopProxy) h.get(proxy);    
    	Field advised = aopProxy.getClass().getDeclaredField("advised");    
    	advised.setAccessible(true);      
    	Object target = ((AdvisedSupport) advised.get(aopProxy)).getTargetSource().getTarget();    
    	return target; 
    	}
    }
 